package com.candy.blog.web.admin;


import com.candy.blog.pojo.Type;
import com.candy.blog.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;


/**
 * @version 1.0
 * @author: 南风
 * @description
 * @date: 2022/2/12 17:08
 */
@Controller
@RequestMapping("/admin")
public class TypeController {
    @Autowired
    private TypeService typeService;

    @GetMapping("/types")
    public String types(@PageableDefault(size = 3, sort = {"id"}, direction = Sort.Direction.DESC) Pageable pageable,
                        Model model) {
        model.addAttribute("page", typeService.listType(pageable));
        return "admin/types";

    }

    // 返回新增分类页面
    @GetMapping("/types/input")
    public String input(Model model) {
        model.addAttribute("type", new Type());
        return "admin/types - input";
    }

    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type", typeService.getType(id));
        return "admin/types - input";
    }

    //提交新增分类信息
    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes) {
        // 通过查询判断新增分类是否已经存在，存在则不进行新增操作
        Type typeByName = typeService.getTypeByName(type.getName());
        if (typeByName != null) {
            result.rejectValue("name", "nameError", "不能添加重复的分类");
        }

        // 如果返回的信息有错，就跳转回输入页面
        if (result.hasErrors()) {
            return "admin/types - input";
        }
        Type saveType = typeService.saveType(type);
        if (saveType == null) {
            // 如果保存信息为null，则为保存失败
            attributes.addFlashAttribute("message", "新增失败");
        } else {
            // 否则保存成功
            attributes.addFlashAttribute("message", "新增成功");
        }
        return "redirect:/admin/types";
    }

    // 编辑分类信息
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,
                           @PathVariable Long id, RedirectAttributes attributes) {
        // 通过查询判断新增分类是否已经存在，存在则不进行新增操作
        Type typeByName = typeService.getTypeByName(type.getName());
        if (typeByName != null) {
            result.rejectValue("name", "nameError", "不能添加重复的分类");
        }

        // 如果返回的信息有错，就跳转回输入页面
        if (result.hasErrors()) {
            return "admin/types - input";
        }
        Type saveType = typeService.updateType(id, type);
        if (saveType == null) {
            // 如果保存信息为null，则为保存失败
            attributes.addFlashAttribute("message", "更新失败");
        } else {
            // 否则保存成功
            attributes.addFlashAttribute("message", "更新成功");
    }
        return "redirect:/admin/types";
    }

    // 删除分类信息
    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes) {
        typeService.deleteType(id);
        attributes.addFlashAttribute("message", "删除成功");
        // 删除成功后返回分类列表页
        return "redirect:/admin/types";
    }
}
